DESCRIPTIONS OF SIXTY-EIGHT NEW SHELLS. 223 



congener, Smith, being remarkable for ita regular beaded spiral zone just below 

 the sutures of each whorl, above which are two spiral clearly-cut grooves, 

 the middle of the upper whorls being most beautifully obliquely costulate, the 

 costas terminated above by a double sulcus surrounding a narrow spiral lira. 

 The last whorl, equalling the others in size, is almost entirely grooved and 

 spirally lirate, the lirse below being rufous-spotted. Outer lip thin, perhaps 

 not quite fully developed, sinus well marked, but not deep ; columella some- 

 what straight ; canal broad and rather prolonged. 



The discovery of this mollusk, the finest Gastropod yet discovered by Mr. 

 Townsend, if we except Conus chjptospira, M. & S., adds another magnificent 

 Pleurotomid to the many fine species of this family obtained in contiguous 

 waters, during the "Investigator" Expedition chiefly (such forms as P. symbiotes, 

 Wood-Mason & Alcock, P. congener, Smith, and P. subcorpulenta, fcmith ° 

 occurring to one's recollection at once), and gives another proof of its wonder- 

 ful development in Indian seas. 



DRILLIA DIVES, sp. n. (PI. C. fig. 15.) 



D. testa gracili, fusiformi, delicata, albo-cinerea ; anfractibus decern, quorum 

 tres apicales brunnei, omnino hyalini, lgevissimi, cseteris apud suturasimpressis, 

 ventricosulis, longitudinaliter obliquicostatis, costis anfractum apud ultimum 

 circa undecim, undique spiraliter striatis, supra, juxta suturas, zona spirali 

 rufa decorata, ultimo anfractu simili modo bizonato, ad basim producto albo, 

 nitido ; apertura oblonga, labro paullum incrassato, sinu lato, haud prof undo, 

 canali brevi. 



Long. 17, lat. 5 mm. 

 Hab. Persian Gulf, Gulf of Oman, Maskat, 15 fathoms. 

 Allied to D. chjdonia, M. & S. (Proc. Zool. Soc. 1901, vol. ii, p. 437, pi. xxiii, 



fig. 24), but the whorls are not angled, the colouration is quite different, and the 



spiral ribbing is coarser in D. dives. 



DRILLIA PHILOTIMA t, sp. n. (PI. C. fig. 16.) 

 D. testa attenuata, fusiformi, solidula, albo-cinerea, aspera ; anfractibus 11, 

 quorum duo apicales vitrei, f usci, cseteris ventricosulis, regulariter obliquicos- 

 tatis, costis anfractus ad superos paucis, crassioribus, in ultimo et penultimo 

 numerosis, ad quindecim, et angustioribus, brunneo tinctis, suffusis, et maculatis, 

 transversim nodiliratis, ultimo anfractu dorsaliter juxta labrum varicoso, 

 brunneo suffuso et zonato ; apertura oblonga, angusta, intus alba, labro 

 paullum effuso, sinu distincto, profundo, canali lato, brevi ; columella recta. 

 Long. 30, lat. 8 mm. 



Hab. Persian Gulf, off Bahrein Islands, 30 — 50 fathoms. 

 Only one example secured of a distinct and handsome Drlllia, the nearest 

 approximation to which is to be found in D. latifasciata, Sowb., from Japan, 

 considered by some authors as synonymous with D. japonica, Lischke. There 

 is no beading at the sutures, however, and the form is more graceful. 



* Ann. and Mag. Nat. Hist, ser. 6, vol. xiv, pp. 160, 161, pi. iii, figs, 4—80. 

 j- piXoTj/a,*}?, honoured. 



